Device applicable for dust removal in mine tanks

Abstract

A device for dust removal in mine tanks, including dust hoods, pneumatic conveying pipelines, a tape-sealed synchronous transfer system and a dust removal device. The tape-sealed synchronous transfer system includes a gas transmission port, a movable air box, a ventilating groove, ventilating openings, rubber tapes, and rollers. The movable air box is an inverted "U" shape and is movably arranged on an upper surface of the ventilating groove and is movable synchronously with the pneumatic conveying pipelines. On an upper surface of the ventilating groove are provided ventilating openings for connecting the movable air box and the ventilating groove. Distances among ventilating openings are smaller than a length of the movable air box to ensure the movable air box covers at least one of the ventilating openings at any time, and more than a ventilating opening communicates with the movable air box and the ventilating groove all times.

Description

DEVICE APPLICABLE FOR DUST REMOVAL IN MINE TANKS Technical Field The present invention relates to the technical field of dust control in production workshops, in particular to a device applicable for dust removal in mine tanks. Background Technology Mineral materials such as raw ores and sintered ores in steel plants are often stored in several silos with a total length of tens of meters, transported by belts to top portions of silos and then carried by discharging vehicles continuously and orderly to various silos. When loading and unloading the mineral materials, a large amount of dust escapes due to large drop height of the mineral materials and positive pressure in the silos, continuous operation and other factors brings huge dust pollutions in workshops. Existing dust control techniques for mining tank unloading are mainly divided into two categories, the first one is by combination of ventilation slots and external dust removers, and the second one is to move and operate dust removers synchronously with unloading cars. For the first category dedusting by combination of ventilation slots and external dust removers, the external dust removers are connected with the ventilation slots, and the ventilation slots are mainly used for transporting and sucking dust at unloading points, and there are some existing technical solutions like a movable dust removal / ventilation vehicle (disclosed in ZL201821339696.0, ZL200720086152.3 and ZL201811175865.6), a partition ventilation groove (disclosed in ZL201520040533.2) and so on. The ventilation grooves used in present technical solutions are connected by steel structures on the lower, left and right sides and upper portions thereof are sealed by belts. With this method certain ventilation and suction effects can be achieved when the belts cover the left and right sides properly, and the dust generated at discharge points can be absorbed to a certain extent. However, lengths of the ventilation slots are generally tens of meters or even hundreds of meters. With the increase of running time, the belts are frequently opened and closed, problems such as belt deviation, belt aging, belt deformation, etc. are very liable to occur, so as to directly lead to a large area of air leakage in upper portions of the ventilation slots, and suction air of the dust removers cannot be transmitted to the unloading points, therefore a good dust collection effect cannot be achieved. Therefore, weak sealing of the upper belts of the ventilation slots is the Achilles heel of the traditional ventilation slots. In the second category that dust removers move and operate synchronously with unloading cars, dust removers are installed next to unloading cars; dust sucked at unloading points directly enters the dust removers for purification. In this way, the dust removers and the unloading cars operate synchronously, and there is no movable ventilation groove, which can avoid air leakage in the ventilation groove to a certain extent. There are some existing technical solutions like a fully enclosed mobile ventilation and dust removal system (disclosed in ZL201410303004.7), a parallel moving cloth bag filter (disclosed in ZL201310127255.X), a mobile flatbed truck equipped with pulse dust collector (disclosed in ZL200620076303.2and ZL200720042556.2), and so on. However, the dust removers of the present category in mentioned technical solutions need to run synchronously with the unloading cars, and the dust removers are located indoors, which greatly restrict volumes of the dust removers. When volumes of the dust removers are reduced, upper limits of the dust removers' processing capacities are reduced accordingly, exhaust air volumes at unloading points are obviously insufficient, consequently dust removal effects are not satisfactory. At the same time, the dust removers are arranged indoors, and it is more difficult to conduct maintenance works such as dust removal and bag replacement, which affects the dust removal effect as well. In addition, when the dust removers move with the unloading vehicles, cables that supply power also follow, that is to say, high-power cables move back and forth within distances of tens of meters or even hundreds of meters, which will reduce the reliability of the cables, increase the failure rate of power supply, and cause leakage danger. Finally, overall weights of dust removers are so large that additional powers need to be equipped to follow reciprocating motions of the unloading vehicles, which will increase energy consumption of total systems, further, dust removers are equipped with independent powers and unloading vehicles are equipped with independent powers, which increase difficulties of synchronous movement of the mentioned two and increase the failure rate of the entire systems. Summary of the Invention In order to overcome the above technical defects, the present invention provides a device for dust removal in mine tanks, comprising dust hoods, pneumatic conveying pipelines, a tape-sealed synchronous transfer system and a dust removal device, wherein the dust hoods and the pneumatic conveying pipelines are all fixed on a discharging vehicle and move synchronously with the same for dust collection and dust transportation respectively, the dust hoods are arranged above where materials separate from belts and enter into hoppers, the dust removal device generates suction forces, which can form negative pressure in the tape-sealed synchronous transfer system and the pneumatic conveying pipelines, and conduct the negative pressure to the dust hoods, so as to suck dust generated during discharging, and the dust is imported into a ventilating groove through the tape-sealed synchronous transfer system, and then is removed by the dust removal device. Ends of the pneumatic conveying pipelines are connected with the dust hoods, and other ends thereof are connected with a gas transmission port of the tape-sealed synchronous transfer system. The tape-sealed synchronous transfer system comprises the gas transmission port, a movable air box, a ventilating groove, ventilating openings, rubber tapes, and rollers; the movable air box is configured to nearly an inverted "U" shape and movably arranged on an upper surface of the ventilating groove, and is movable synchronously with the pneumatic conveying pipelines, the ventilating groove is an enclosed structure on four sides, on an upper surface of the ventilating groove are provided ventilating openings for connecting the movable air box and the ventilating groove, distances among ventilating openings are smaller than a length of the movable air box, so as to ensure the movable air box cover at least one of the ventilating opening at any time, at least four sets of rollers are arranged respectively at a front end portion and a rear end portion and upper turning points of the movable air box, the rollers at the front end portion and the rear end portion of the movable air box are arranged above the rubber tapes to exert downward pressure on the rubber tapes, the rollers at the upper turning points of the movable air box are below the rubber tapes to change moving directions of the rubber tapes; when the movable air box moves, the rollers at the front end portion and a rear end portion of the movable air box are driven to rotate, and the rubber tapes and the movable air box move at an equal speed, so that the rubber tapes in a direction of movement are lifted and the rubber tapes in an opposite direction are pressed down, thereby generally ensuring that the ventilating openings inside the movable air box are in an open state, and the ventilating openings outside the movable air box are in a closed state. The movable air box moves synchronously with the discharging vehicle, and when the movable air box moves above a ventilating opening which is unsealed by the rubber tapes and is in an open state, other ventilating openings outside the movable air box are closed, so as to maintain negative pressure in the ventilating groove, and the dust hoods, the pneumatic conveying pipelines and the movable air box are communicated with the ventilating openings so that dust enters the dust removal device through the dust hoods, the pneumatic conveying pipelines, the movable air box, ventilating openings and the ventilating groove, and is removed by the dust removal device. Further, the movable air box are provided with air box rollers, the ventilating groove is provided with guide rollers, the air box rollers are arranged at bottom portions of the movable air box, and the air box rollers move on the guide rollers, so as to reduce friction when the movable air box runs, and better realize synchronous movement of the movable air box on the upper surface of the ventilating groove along the pneumatic conveying pipelines. Further, the movable air box is provided with two wind curtain generators and the two wind curtain generators are respectively at a head end and a tail end inside the movable air box so as to generate wind curtains and realize cleaning of dust accumulated on top portions of the ventilating groove. Further, the dust hoods are configured to be more than one, arranged respectively in front of a discharging port, at the discharge port and behind the discharge port, so as to achieve a higher suction speed to prevent dust leakage. Further, the device for dust removal in mine tanks further comprises branch pipes, wherein the branch pipes connect the hoppers and the ventilating groove, and the dust removal device generates exhausting forces, which can form negative pressure in the ventilating groove and conduct the negative pressure to the branch pipes, so as to suck dust generated in the hoppers when materials are discharged. Further, above the dust hoods are arranged wind curtain generators, and the wind curtain generators generate downward high-speed airflows along edges of the dust hoods so that with air guiding effects of the wind curtain jet an inside of the dust hoods can be effectively isolated from an outside of the dust hoods, thereby preventing dust from escaping. Further, on the dust hoods are provided pressing and sealing devices, the pressing and sealing devices comprise the rubber tapes, the rollers, and at least four sets of the rollers are respectively arranged at the front end portion and the rear end portion and the upper turning points of the dust hoods, the rollers at the front end portion and the rear end portion of the dust hoods are above the rubber tapes to exert downward pressure on the rubber tapes, and the rollers at the upper turning points of the dust hoods are below the rubber tapes to change moving directions of the rubber tapes. When a discharging place is changed, the dust hoods move with the discharging vehicle; and when the dust hoods move, the rollers at front and rear ends of the dust hoods are driven to rotate, and the rubber tapes and the dust hoods move at a same speed, so that the rubber tapes in a direction of movement are lifted and the rubber tapes in an opposite direction are pressed down to seal a mine tank, thereby realizing sealing of the mine tank not covered by the dust hoods and preventing the dust from leaking. In accordance with an aspect of at least one embodiment, there is provided a device for dust removal in mine tanks, comprising dust hoods, pneumatic conveying pipelines, a tape-sealed synchronous transfer system and a dust removal device, wherein the dust hoods and the pneumatic conveying pipelines are all fixed on a discharging vehicle and move synchronously with the same, the dust hoods are arranged above where materials separate from belts and enter into hoppers, ends of the pneumatic conveying pipelines are connected with the dust hoods, another ends thereof are connected with a gas transmission port of the tape-sealed synchronous transfer system; the tape-sealed synchronous transfer system comprises the gas transmission port, a movable air box, a ventilating groove, ventilating openings, rubber tapes, and rollers; the movable air box is configured to be nearly an inverted "U" shape and movably arranged on an upper surface of the ventilating groove, and is movable synchronously with the pneumatic conveying pipelines, the ventilating groove is a structure enclosed on four sides, on an upper surface of the ventilating groove are provided ventilating openings for communicating the movable air box and the ventilating groove, distances among ventilating openings are smaller than a length of the movable air box, at least four sets of rollers are arranged at a front end portion and a rear end portion and upper turning points of the movable air box, the rollers at the front end portion and the rear end portion of the movable air box are arranged above the rubber tapes, the rollers at the upper turning points of the movable air box are below the rubber tapes; wherein the movable air box are provided with air box rollers, the ventilating groove is provided with guide rollers, the air box rollers are arranged at a bottom portion of the movable air box, and the air box rollers move on the guide rollers; wherein the movable air box is provided with two wind curtain generators and the two wind curtain generators are respectively at a head end and a tail end inside the movable air box so as to generate wind curtains; wherein on the dust hoods are provided pressing and sealing devices, the pressing and sealing devices comprise rubber tapes and rollers, and at least four sets of the rollers are respectively arranged at front end portions and rear end portions and upper turning points of the dust hoods, the rollers at the front end portions and the rear end portions of the dust hoods are above the rubber tapes, and the rollers at upper turning points of the dust hoods are below the rubber tapes. Compared to the prior art, the present invention has following beneficial effects. In the present invention, mechanical principles are adopted to completely solve the disadvantage of large amounts of air leakage in the ventilating grooves in a traditional belt pressing and sealing method. The ventilating groove of the present invention is a structure closed on four sides and only provided with ventilating openings communicating with the outside, the ventilating openings are opened or closed by the rubber tapes and the rollers, which has strong reliability, and negative pressure in the ventilating groove can generate suction to the rubber tapes above the ventilating openings, so there is almost no air leakage. Due to the strong sealing, air volume required for dust removal is significantly reduced. At the same time, the movable air box is used to solve the problem of the transfer of dusty airflow between two ventilating openings of the ventilation groove, and more than one ventilating openings are always communicated to the movable air box and the ventilating groove, so as to guarantee smooth dust removal in case of continuous discharge, by which the dust removal effect can be significantly improved and the energy consumption of dust removal reduced. Brief Description of the Drawings The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of embodiments in conjunction with the attached drawings below. Figure 1 is a structural view of a device for dust removal in mine tanks of the present invention. Figure 2 is a lateral structural view of the device for dust removal in mine tanks of the present invention. Figure 3 is a structural view of pressing and sealing devices above dust hoods of the present invention. Figure 4 is a three-dimensional structural view of a movable air box of the present invention. Figure 5 shows a use state of the device suitable for dust removal in mine tanks of the present invention. The markups in the drawings are indicated as follows: 1-dust hood; 2-pneumatic conveying pipeline; 3-tape-sealed synchronous transfer system; 4-hopper; 5-gas transmission port; 6-movable air box; 7-ventilating groove; 8-ventilating opening; 9-discharging vehicle; 10-air box roller; 11-guide roller; 12-branch pipe; 13-pressing and sealing device; 14-rubber tape; and 15-roller. Specific Embodiments Embodiments of the present invention are described in detail below, examples of which are shown in the attached drawings, where identical or similar labels throughout indicate identical or similar elements or elements having identical or similar functions. The embodiments described below by reference to the attached drawings are illustrative and are intended only to explain the invention and are not to be construed as limitations of the present invention. Embodiment 1 As shown in figure 1, A device suitable for dust removal in mine tanks, comprises dust hoods 1, pneumatic conveying pipelines 2, a tape-sealed synchronous transfer system 3 and a dust removal device, wherein the dust hoods 1 and the pneumatic conveying pipelines 2 are all fixed on a discharging vehicle 10 and move synchronously with the same, the dust hoods 1 are arranged above where materials separate from belts and enter into hoppers 4, ends of the pneumatic conveying pipelines 2 are connected with the dust hoods 1, another ends thereof are connected with a gas transmission port 5 of the tape-sealed synchronous transfer system 3; the tape-sealed synchronous transfer system 3 comprises the gas transmission port 5, a movable air box 6, a ventilating groove 7, ventilating openings 8, rubber tapes 14, and rollers 15; the movable air box 6 is similar to an inverted "U" shape and movably arranged on an upper surface of the ventilating groove 7, which can move synchronously with the pneumatic conveying pipelines 2, the ventilating groove 7 is an enclosed structure on four sides, on an upper surface of the ventilating groove 7 are provided ventilating openings 8 for connecting the movable air box 6 and the ventilating groove 7, distances among ventilating openings 8 are smaller than a length of the movable air box 6, so as to ensure the movable air box 6 covers at least one of the ventilating openings 8 at any time, at least four sets of rollers 15 are arranged at front and rear ends and upper turning points of the movable air box 6, the rollers 15 at front and rear ends of the movable air box 6 are arranged above the rubber tapes 14 to exert downward pressure on the rubber tapes 14, the rollers 15 at upper turning points of the movable air box 6 are below the rubber tapes 14 to change moving directions of the rubber tapes 14; when the movable air box 6 moves, the rollers 15 at front and rear ends of the movable air box 6 are driven to rotate, and the rubber tapes 14 and the movable air box 6 move at a same speed, so that the rubber tapes 14 in a direction of movement are lifted and the rubber tapes 14 in an opposite direction are pressed down, thereby generally ensuring that the ventilating openings 8 inside the movable air box 6 are in an open state, and the ventilating openings 8 outside the movable air box 6 are in a closed state. The dust removal device generates exhausting forces, which can form negative pressure in the tape-sealed synchronous transfer system 3 and the pneumatic conveying pipelines 2 and conduct the negative pressure to the dust hoods 1, so as to suck dust generated in the hoppers when materials are discharged. When one of the hoppers 4 is fully filled, the discharging vehicle 9 moves to another one of the hoppers 4, and the discharging vehicle 9 drives the dust hoods 1, the pneumatic conveying pipelines 2 and the movable air box 6 to move synchronously. When the movable air box 6 moves to above one of the ventilating openings 8, unsealed by the rubber tapes 14, the ventilating opening 8 is in an open state, and other ventilating openings 8 outside the movable air box 6 are in a closed state, so as to maintain negative pressure in the ventilating groove 7. Since the dust hoods 1, the pneumatic conveying pipelines 2, and the movable air box 6 are communicated with the ventilating opening 8, dust enters into the dust removal device from the dust hoods 1, the pneumatic conveying pipelines 2, the movable air box 6, the ventilating opening 8 and the ventilating groove 7 and then is collected by the dust removal device. Embodiment 2 Compared to the embodiment 1, following improvements are made in the present embodiment. The dust hoods 1 are configured to be more than one and arranged respectively above where materials leave from belts and enter the hoppers 4, and on mine tanks near where materials fall. On the dust hoods 1 are provided pressing and sealing devices 13, the pressing and sealing devices 13 comprise rubber tapes 14, rollers 15, and at least four sets of the rollers 15 are respectively arranged at front and rear ends and upper turning points of the dust hoods 1, the rollers 15 at front and rear ends of the dust hoods 1 are above the rubber tapes 14 to exert downward pressure on the rubber tapes, and the rollers 15 at upper turning points of the dust hoods 1 are below the rubber tapes 14 to change moving directions of the rubber tapes. When a discharging place is changed, the dust hoods 1 move with the discharging vehicle 9; and when the dust hoods 1 move, the rollers 15 at front and rear ends of the dust hoods 1 are driven to rotate, and the rubber tapes 14 and the dust hoods 1 move at a same speed, so that the rubber tapes 14 in a direction of movement are lifted and the rubber tapes 14 in an opposite direction are pressed down to seal upon a mine tank, thereby realizing sealing of the mine tank uncovered by the dust hoods 1 and preventing the dust from leaking out. At the same time, above the dust hoods 1 are arranged wind curtain generators, and the wind curtain generators generate downward high-speed airflows along edges of the dust hoods 1 so that the wind curtains guide airflows to effectively isolate the inside of the dust hoods from the outside of the dust hoods, thereby preventing dust from escaping. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention can be embodied in other specific forms without departing from the scope of the present invention. Therefore, embodiments should be viewed in all respects as exemplary and non-restrictive; the scope of the present invention is defined by the appended claims rather than the above description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be included in the present invention; and any reference sign in a claim should not be construed as limiting the claim concerned. The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. All minor modifications, equivalent replacements and improvements made to the above embodiments according to the technical essence of the present invention shall be included within the scope of protection of the technical solutions of the present invention.

Claims

1. A device for dust removal in mine tanks, comprising dust hoods (1), pneumatic conveying pipelines (2), a tape-sealed synchronous transfer system (3) and a dust removal device, wherein the dust hoods (1) and the pneumatic conveying pipelines (2) are all fixed on a discharging vehicle (10) and move synchronously with the same, the dust hoods (1) are arranged above where materials separate from belts and enter into hoppers (4), ends of the pneumatic conveying pipelines (2) are connected with the dust hoods (1), another ends thereof are connected with a gas transmission port (5) of the tape-sealed synchronous transfer system (3); the tape-sealed synchronous transfer system (3) comprises the gas transmission port (5), a movable air box (6), a ventilating groove (7), ventilating openings (8), rubber tapes (14), and rollers (15); the movable air box (6) is configured to be nearly an inverted "U" shape and movably arranged on an upper surface of the ventilating groove (7), and is movable synchronously with the pneumatic conveying pipelines (2), the ventilating groove (7) is a structure enclosed on four sides, on an upper surface of the ventilating groove (7) are provided ventilating openings (8) for communicating the movable air box (6) and the ventilating groove (7), distances among ventilating openings (8) are smaller than a length of the movable air box (6), at least four sets of rollers (15) are arranged at a front end portion and a rear end portion and upper turning points of the movable air box (6), the rollers (15) at the front end portion and the rear end portion of the movable air box (6) are arranged above the rubber tapes (14), the rollers (15) at the upper turning points of the movable air box (6) are below the rubber tapes (14); wherein the movable air box (6) are provided with air box rollers (10), the ventilating groove (7) is provided with guide rollers (11), the air box rollers (10) are arranged at a bottom portion of the movable air box (6), and the air box rollers (10) move on the guide rollers (11); wherein the movable air box (6) is provided with two wind curtain generators and the two wind curtain generators (6) are respectively at a head end and a tail end inside the movable air box (6) so as to generate wind curtains; wherein on the dust hoods (1) are provided pressing and sealing devices (13), the pressing and sealing devices (13) comprise rubber tapes (14) and rollers (15), and at least four sets of the rollers (15) are respectively arranged at front end portions and rear end portions and upper turning points of the dust hoods (1), the rollers at the front end portions and the rear end portions of the dust hoods (1) are above the rubber tapes (14), and the rollers at upper turning points of the dust hoods (1) are below the rubber tapes (14).

2. The device for dust removal in mine tanks according to claim 1, wherein the dust hoods (1) are configured to be more than one and arranged respectively in front of a discharging port, at the discharge port and behind the discharge port.

3. The device for dust removal in mine tanks according to claim 1 further comprising branch pipes (13), wherein the branch pipes (13) connect the hoppers (4) and the ventilating groove (7).

4. The device for dust removal in mine tanks according to claim 1, wherein above the dust hoods (1) are arranged wind curtain generators, and the wind curtain generators generate downward high-speed airflows along edges of the dust hoods (1).